html,
body {
  height: 100%;
  margin: 0;
}
.loader-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.loader {
  width: 48px;
  height: 48px;
  display: inline-block;
  position: relative;
}
.loader::after,
.loader::before {
  content: "";
  box-sizing: border-box;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(100, 100, 100, 0.5);
  position: absolute;
  left: 0;
  top: 0;
  animation: animloader 2s linear infinite;
}
.loader::after {
  animation-delay: 1s;
}

@keyframes animloader {
  0% {
    transform: scale(0);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 0;
  }
}